0.10.3 — Real #356 root cause found in boschshcpy, plus a wider APK audit

Pins boschshcpy==0.4.6 (see that repo's CHANGELOG — this release grew
out of finding the real root cause of #356 there, which led to a wider
audit against a decompiled copy of the official Bosch app).

Fixed

• #356 — Motion Detector II [+M] indicator-light entity missing.
  Root cause turned out not to be the installation profile (that theory,
  posted on the issue, was wrong and has been retracted there): the
  boschshcpy property this integration's light.py depends on
  (supports_light) was never actually implemented in the lib, despite
  0.9.2's CHANGELOG claiming it shipped paired with boschshcpy 0.4.5.
  Since light.py reads it via getattr(light, "supports_light", False),
  the missing attribute silently defaulted to "unsupported" for every
  [+M] Motion Detector II since 0.9.2. Fixed lib-side in boschshcpy
  0.4.6; comment here corrected to no longer claim a profile dependency.
• CommunicationQualitySensor had an invented medium state that
  doesn't exist in the real API (boschshcpy's CommunicationQualityService.State
  had a fictional MEDIUM member with no matching value on real
  hardware). Now reports not_supported, the value the Bosch app itself
  uses. Translation key renamed (medium → not_supported) across all
  30 languages.

Added

• Outdoor Siren power-supply fault diagnostics: 4 new diagnostic
  binary_sensor entities — siren_ac_dc_error, siren_battery_defect,
  siren_battery_temperature_abnormal, siren_primary_power_supply_outage.
  boschshcpy's OutdoorSirenPowerSupplyService already exposed all four
  (ac_dc_error/battery_defect/battery_temperature_abnormal/
  primary_power_supply_outage, matching the APK's PowerSupplyState
  getters isAcDcError()/isBatteryDefect()/
  isBatteryTemperatureAbnormal()/isPrimaryPowerSupplyOutage()), but
  boschshc-hass never wired them into an entity — a siren with a real
  AC/DC fault, defective battery, abnormal battery temperature, or a mains
  outage produced zero visible signal in Home Assistant. Gated on
  supports_power_supply, alongside the existing
  SirenAcousticAlarmSensor/SirenVisualAlarmSensor/SirenTamperSensor.
• Installation Profile select now available on relays and smart
  plugs, not just Motion Detector II — InstallationProfileSelect was
  already fully generic (works on any device with supported_profiles),
  it just wasn't offered outside motion_detectors2. Added 4 new profile
  translation strings (light/heating_rcc/boiler/mini_pv) across
  all 30 languages for the wider device vocabulary this now surfaces.
• HeaterTypeSelect: VOLT_FREE_HEATING option — matches the new
  boschshcpy 0.4.6 enum member (a real heater type seen on hardware
  that previously collapsed to UNKNOWN).